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(No Model.) 2 Sheets-Sheet 1. J. DAVIS.

MANUFACTURE OF ANGLE IRON. No. 369,277. Patented Aug. 30, 1887.

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(No Model.) 2 Sheets-Sheet 2. J DAVIS.

MANUFAGTURE OF ANGLEIRON.

Patented Aug. 30, 1887.

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UNITED STATES PATENT Oriana.

.IOlEIh DAVIS, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO OLIVER BROTHERS &PHILLIPS, OF SAME PLACE.

MANUFACTURE OF ANGLEJR ON.

SPECIFICATION forming part of Letters Patent No. 369,277, dated August30, 1887.

Application filed May 18, 1887. Serial No. 238,642. (No model.)

To aZZ whom it 72mg concern:

Be itknown that 1, JOHN DAVIS, of Pittsbnrg, in the county of Alleghenyand State of Pennsylvania, have invented a new and use ful Improvementin the Manufacture of An,- gle-Iron; and I do hereby declare thefollowing to be a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, forming part of thisspecification, in which- Figure 1 is a front elevation of a set of rollsdesigned for the manufacture of angle-iron, and Fig. 2 is a similar viewof finishing-rolls embodying the principles of my invention.

Like symbols ofroference indicate like parts in each.

The prior state of the art in rolling angleiron is illustrated in Fig.l. The rolls a, b, and c are provided with a number of grooves orpasses, numbered in order 1 2 34 5, through which the billet or bar ofiron is passed in succession to form the finished angle-iron. At each ofthese passes it will be noticed that the parting of the rolls is at theedge or corner of the angle-iron, and there is consequently a tin orroughness on the finished iron at the edges, which detracts from itsappearance and is a disadvantage when the iron is used in exposed orconspicuous places.

The object of my invention is to obviate this objection to themanufacture of angle-iron as heretofore practiced, and to provide meansforgiving to the edge of the angle-iron a regularly-finished shape.

To this end it consists in the subjection of the angle-iron, after ithas been rolled as above described, to the action of rolls,whereby theiron is rolled and shaped at the edges, the parting of these rolls beingarranged at the side and not at the edge of the iron. Thesefinishing-rolls d, e, andf are shown in Fig. 2, and there are twopasses, 7 and 8, in the first of which the grooves kin the roll at areshaped so that the edges of the angleiron shall eugage the bases of thegrooves 72, and that the parting of the rolls shall be at the side ofthe angle, the preferable shape being that which I have shown, whereinthe outer sides of the grooves are less divergent than the sides of theangle. In this way the stress of the rolling is brought to bear on theedges of the iron. The bases of the grooves are preferably curved, asshown, so as to give the angle-iron a rounded and symmetrical shape,though this, is not necessary, as a square, oval, or any other desiredshape may be given. In passing through this groove the angle-iron isrolled and so shaped on its edges as to efface the fins orirregularities produced by the first set of rolls; but it is somewhatdistorted. To restore it to its proper angle shape it is passed throughthe pass 8, wherein the sides and not the edges are rolled.

The finishing-rolls shown in Fig. 2 may be adjusted to shape angle-ironof diifercnt width and thickness by simple separation 'of the rolls.

The grooves of the rolls may be somewhat altered in shape withoutdeparting from the principle of my invention, which is set forth in thefollowing claims.

I claim- 1- An improvement in the manufacture of angle-iron, whichconsists in rolling the iron into the proper angle shape and thenrolling it on the edges, whereby the edges are made regular,substantially as and for the purposes described.

2. An improvement in the manufacture of angle-iron, which consists inrolling the iron laterally into the proper angle shape, then roiling iton the edges in a pass whereof the outer sides of the grooves are lessdivergent than the sides of the angle-iron, and then straightening theiron by rolling it laterally, substantially as and for the purposesdescribed.

3. Finishing-rollsforrollingangle-iron,having a pass constituted byrolls, one of which has grooves whose bases engage the edges of theangle-iron, the parting of the rolls being above the bases of thegrooves, substantially as and for the purposes described.

In testimony whereof I have hereunto set my hand this 13th day of May,A. D. 1887.

J OHN DAVIS.

W'itnesses:

W. B. Conwrn, JNo. K. SMITH.

